FAMILY nAVIID.E. LOONS. 27 



FAMILY GAVIID/E. 

 Loons. 



Toes, four; front toes, palmate (full webbed) ; bill, pointed; 

 ^^^ tarsus, flattened ; hind toe, with flap or small lobe. 



* Group I. Win.ij:, <>.5() to 11 inches lonji:. 



Back, with whitespots ; llint.ii, wliili- or wliitisli (iiniiiatun; or winter). 



(Idvin Innimi'. Red=throated Loon. 



S.'c No. 7. 



Hack, wiUioul distiiirt whito spots; tlic tV.iihci-. edj^ed uitli ashy; tluo.it, wliiit- or 

 »liisk\- (imrnaturi' or winter). (T(H'<i(i arrfints. Black-throated Loon. 



See No. G. 



ilciil, .isliy ^nay ; tiiroat, lilack r.-nliilt ). Oavia <irrtiriis. Black-throated Loon. 



Si'c No. c. 



Tiiroat, i,nay ; front ol m^ck, clicsi niil Itrowii (adult). 



(ffiria Inntttu'. Red-throated Loon. 

 Si'c \o. 7. 



^ Group 2. Winv:, 11 to 15 inches lon^. 

 Section 1. Depth of bill at base, more than .85. 



Ili:i(|, black ladiill). Gttnn iinlnr. Loon. 



See No. fi. 

 Toil ol 111 •.hi, i^rayisli ; t liroal , w liite i iiniiial inc or u inter iilnin.i«;;eK 



(tni>i<i iiiiliir. Loon. 



See No. r>. 



Section 2. Depth of bill at base, less than .85. 



Ilea.!, ash Hji-.iy ; throat, l.lai-k (aihilt). Gavin iirrtinis. Ulack-throated l.txin. 



See No. Ik 



'I'hroal, ;;ray ; front of neck, chest nnt hmw n (a<hilt). 



(litrin liiniiiK . Red-throated Loon. 

 See No. 7. 



• Kiir <lirrftliiiiH for inciiHiirriiicnl, hi-o p.'ljfo !». 



